Re: BUG #13498: make check failures

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: pete(at)petelancashire(dot)com
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #13498: make check failures
Date: 2015-07-13 20:13:38
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pete(at)petelancashire(dot)com writes:
> make check
> -O2 passes w/o errors
> -O3 with or without -strict fails

Presumably what is happening here (and also in your followon #13499)
is that xlc with higher optimization levels generates bad code. Whether
this is a compiler bug, or is traceable to a valid deficiency in our code,
is really impossible to tell for anyone without access to that compiler
(and even with access, it might be a lot of work). If you want to trace
it down I'm afraid it's going to be pretty much your responsibility to do

regards, tom lane

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